Trailer Anatomy, VIN & Data Plates

Trailer types, parts, VINs, certification labels and weight ratings.

Lessons

1. 01Identification Records, VIN Scope and Catalog DataDistinguish the identification and catalog information actually supplied from VIN and data-plate details that these excerpts do not establish.
2. 02Understand GVWR, GAWR and Component LimitsInterpret vehicle and axle weight-rating terms while recognizing that the lowest-rated component limits an assembly.
3. 03Recognize Hitch Load and Load DistributionExplain how center of gravity, axle placement and uneven loading affect trailer support and handling.
4. 04Identify Hitch and Coupler ComponentsRecognize the mating components and basic functions of common trailer connections.
5. 05Identify Axles, Springs and Suspension AttachmentsRecognize the principal parts and movement of leaf-spring and rubber-cord torsion running gear.
6. 06Recognize Frame Attachment, Clearance and AlignmentExplain why running gear needs suitable frame support, movement clearance and alignment.
7. 07Recognize Drum and Disc Brake AnatomyDistinguish brake friction components from the mechanisms that apply them.
8. 08Understand Brake Controls and Breakaway ComponentsExplain the roles of controllers, hydraulic actuators and breakaway power without treating them as interchangeable components.
9. 09Recognize Hubs, Bearings and SealsIdentify wheel-end components and distinguish bearing arrangements before selecting maintenance instructions.
10. 10Match Wheels, Tires and Wheel FastenersRecognize the wheel characteristics and fastening requirements that must match the hub, tire and trailer application.